Regie Nationale Des Usines Renault

Automobiles, Peugeot

Pierre Cochard

Claude Henault

Christian Guicherd

Bernard Vallee

Bruno De Saint-Marie

A process for supplying fuel to an internal combustion engine of the multi-cylinder type with controlled fuel injection and comprising a controlled fuel vapor recovery system. During predetermined operating phases of the engine, the fuel injection is stopped for a given period, while the fuel vapors trapped in the recovery system are recycled into an intake circuit of the engine.

Process for supplying fuel to an internal combustion engine and engine

A method and apparatus for measuring the rate of recirculation of exhaust gases in an internal combustion engine are disclosed. The rate of recirculation is measured by determining the percentage of carbon gas in the exhaust gas, determining the percentage of carbon gas in the intake gas at a point downstream from the introduction of the recirculated gas and comparing the ratios of carbon gas in the two gases. The gases are drawn off for collection and determination of carbon gas content by a vacuum generator connected to a carbon analyzer and a pressure regulator. A 3-way selection valve is used for drawing off either the exhaust or intake gas.

Method for measuring the rate of recirculation of exhaust gases in an

In a method and apparatus for controlling the fuel feed to a stratified-charge internal combustion engine, from idle up to the position corresponding with the maximum flow of air, the overall richness (r.sub.g) of the combustible mixture is reduced by acting simultaneously upon the flow of fuel feeding the main chamber and upon the flow of fuel injected into the auxiliary chamber. For higher loads the maximum flow of air is kept constant and r.sub.g is increased by continuing to act upon both fuel flows. By keeping the richness of the mixture in the auxiliary chamber substantially constant, it is possible to obtain the best compromise between the performance of the engine and the emission of pollutant gases.

Internal combustion engine fuel feed

An internal-combustion engine fed with a stratified charge and comprising an inlet leading into a combustion chamber for feeding thereinto a main charge of a lean mixture of a first fuel and air, and an injection device for injecting a second fuel into an ignition zone of the combustion chamber in an amount such that the mixture of the second fuel and the air contained in the lean mixture, in the ignition zone at the time of ignition, attains the level of the ignition richness of the second fuel. Thereby, the second fuel undergoes ignition and combustion and effects flame propagation to produce ignition of the first fuel. A holder with a ball valve protects the fuel injector of the injection device by obturating the injector at the end of the compression stroke and during ignition and the subsequent expansion stroke.

Growing community of inventors

Saint Germain les Arpajon, France

Pierre Cochard